Is it possible the cap and rotor are not working correctly ? Letting spark go to the wrong cylinders ?
And have you checked compression on all cylinders to check valve timing ?
Is the check engine light on when the engine is running ?
SOURCE: "I have a 1997 dodge pick up my truck loses power If I step on the gas it backfires"
Change fuel filter and air filter .
SOURCE: 2004 Dodge Ram Backfiring and blowing Muffler
White smoke....Means a Blown Head gasket.. Now its not bad enough to stop the vehicle from running but its bad enough, to blow out white smoke..now sooner or later it will stop completly, but you dont want to warp the cylinder heads too bad, then you will have to replace them also, so you might want to fix this problem as soon as possible...and the muffler keeps going bad, becasue it is filling up with coolant/ or too much water, which it is not designed to do..You also maybe doing damage to your cat. converters also...so be careful....And Goodluck, and keep me posted...
SOURCE: i have a 1996 dodge ram van 2500 5.2l my problem
Sounds like timing is off, or serious misfires.
SOURCE: 99 dodge ram 318 backfires thru exhust sometimes
Backfiring is almost always a timing issue
Check and be sure that your have all the plug wires on the right plugs
Backfiring hard enough can break a crankshaft
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